function folded_normal_cdf_test ( )

%*****************************************************************************80
%
%% folded_normal_cdf_test() tests folded_normal_cdf().
%
%  Licensing:
%
%    This code is distributed under the MIT license.
%
%  Modified:
%
%    05 April 2016
%
%  Author:
%
%    John Burkardt
%
  fprintf ( 1, '\n' );
  fprintf ( 1, 'FOLDED_NORMAL_CDF_TEST():\n' );
  fprintf ( 1, '  FOLDED_NORMAL_CDF() evaluates the Folded Normal CDF.\n' );
  fprintf ( 1, '  FOLDED_NORMAL_CDF_INV() inverts the Folded Normal CDF.\n' );
  fprintf ( 1, '  FOLDED_NORMAL_PDF() evaluates the Folded Normal PDF.\n' );

  a = 2.0;
  b = 3.0;

  check = folded_normal_check ( a, b );

  if ( ~ check );
    fprintf ( 1, '\n' );
    fprintf ( 1, 'FOLDED_NORMAL_CDF_TEST - Fatal error!\n' );
    fprintf ( 1, '  The parameters are not legal.\n' );
    return
  end

  fprintf ( 1, '\n' );
  fprintf ( 1, '  PDF parameter A =         %14g\n', a );
  fprintf ( 1, '  PDF parameter B =         %14g\n', b );
  fprintf ( 1, '\n' );
  fprintf ( 1, '       X            PDF           CDF            CDF_INV\n' );
  fprintf ( 1, '\n' );

  for i = 1 : 10

    x = folded_normal_sample ( a, b );

    pdf = folded_normal_pdf ( x, a, b );

    cdf = folded_normal_cdf ( x, a, b );

    x2 = folded_normal_cdf_inv ( cdf, a, b );

    fprintf ( 1, ' %14g  %14g  %14g  %14g\n', x, pdf, cdf, x2 );

  end

  return
end
